/*!
 * iScroll v4.1.9 ~ Copyright (c) 2011 Matteo Spinelli, http://cubiq.org
 * Released under MIT license, http://cubiq.org/license
 */
(function(){
var m = Math,
  mround = function (r) { return r >> 0; },
  vendor = (/webkit/i).test(navigator.appVersion) ? 'webkit' :
    (/firefox/i).test(navigator.userAgent) ? 'Moz' :
    'opera' in window ? 'O' : '',
  
    // Browser capabilities
    isAndroid = (/android/gi).test(navigator.appVersion),
    isIDevice = (/iphone|ipad/gi).test(navigator.appVersion),
    isPlaybook = (/playbook/gi).test(navigator.appVersion),
    isTouchPad = (/hp-tablet/gi).test(navigator.appVersion),

    has3d = 'WebKitCSSMatrix' in window && 'm11' in new WebKitCSSMatrix(),
    hasTouch = 'ontouchstart' in window && !isTouchPad,
    hasTransform = vendor + 'Transform' in document.documentElement.style,
    hasTransitionEnd = isIDevice || isPlaybook,

  nextFrame = (function() {
      return window.requestAnimationFrame
      || window.webkitRequestAnimationFrame
      || window.mozRequestAnimationFrame
      || window.oRequestAnimationFrame
      || window.msRequestAnimationFrame
      || function(callback) { return setTimeout(callback, 1); }
  })(),
  cancelFrame = (function () {
      return window.cancelRequestAnimationFrame
      || window.webkitCancelRequestAnimationFrame
      || window.mozCancelRequestAnimationFrame
      || window.oCancelRequestAnimationFrame
      || window.msCancelRequestAnimationFrame
      || clearTimeout
  })(),

  // Events
  // QOOXDOO ENHANCEMENT: Use the qooxdoo event types
  RESIZE_EV = 'orientationchange',
  START_EV = 'touchstart',
  MOVE_EV = 'touchmove',
  END_EV = 'touchend',
  CANCEL_EV = 'touchcancel',
  WHEEL_EV = 'mousewheel',

  // Helpers
  trnOpen = 'translate' + (has3d ? '3d(' : '('),
  trnClose = has3d ? ',0)' : ')',

  // Constructor
  iScroll = function (el, options) {
    var that = this,
      doc = document,
      i;

    that.wrapper = typeof el == 'object' ? el : doc.getElementById(el);
    that.wrapper.style.overflow = 'hidden';
    that.scroller = that.wrapper.children[0];

    // Default options
    that.options = {
      hScroll: true,
      vScroll: true,
      x: 0,
      y: 0,
      bounce: true,
      bounceLock: false,
      momentum: true,
      lockDirection: true,
      useTransform: true,
      useTransition: false,
      topOffset: 0,
      checkDOMChanges: false,   // Experimental

      // Scrollbar
      hScrollbar: true,
      vScrollbar: true,
      fixedScrollbar: isAndroid,
      hideScrollbar: isIDevice,
      fadeScrollbar: isIDevice && has3d,
      scrollbarClass: '',

      // Zoom
      zoom: false,
      zoomMin: 1,
      zoomMax: 4,
      doubleTapZoom: 2,
      wheelAction: 'scroll',

      // Snap
      snap: false,
      snapThreshold: 1,

      // Events
      onRefresh: null,
      onBeforeScrollStart: function (e) { e.preventDefault(); },
      onScrollStart: null,
      onBeforeScrollMove: null,
      onScrollMove: null,
      onBeforeScrollEnd: null,
      onScrollEnd: null,
      onTouchEnd: null,
      onDestroy: null,
      onZoomStart: null,
      onZoom: null,
      onZoomEnd: null
    };

    // User defined options
    for (i in options) that.options[i] = options[i];
    
    // Set starting position
    that.x = that.options.x;
    that.y = that.options.y;

    // Normalize options
    that.options.useTransform = hasTransform ? that.options.useTransform : false;
    that.options.hScrollbar = that.options.hScroll && that.options.hScrollbar;
    that.options.vScrollbar = that.options.vScroll && that.options.vScrollbar;
    that.options.zoom = that.options.useTransform && that.options.zoom;
    that.options.useTransition = hasTransitionEnd && that.options.useTransition;
    
    // Helpers FIX ANDROID BUG!
    // translate3d and scale doesn't work together! 
    // Ignoring 3d ONLY WHEN YOU SET that.options.zoom
    if ( that.options.zoom && isAndroid ){
      trnOpen = 'translate(';
      trnClose = ')';
    }    

    // Set some default styles
    that.scroller.style[vendor + 'TransitionProperty'] = that.options.useTransform ? '-' + vendor.toLowerCase() + '-transform' : 'top left';
    that.scroller.style[vendor + 'TransitionDuration'] = '0';
    that.scroller.style[vendor + 'TransformOrigin'] = '0 0';
    if (that.options.useTransition) that.scroller.style[vendor + 'TransitionTimingFunction'] = 'cubic-bezier(0.33,0.66,0.66,1)';
    
    if (that.options.useTransform) that.scroller.style[vendor + 'Transform'] = trnOpen + that.x + 'px,' + that.y + 'px' + trnClose;
    else that.scroller.style.cssText += ';position:absolute;top:' + that.y + 'px;left:' + that.x + 'px';

    if (that.options.useTransition) that.options.fixedScrollbar = true;

    that.refresh();

    that._bind(RESIZE_EV, window);
    that._bind(START_EV);
    if (!hasTouch) {
      that._bind('mouseout', that.wrapper);
      if (that.options.wheelAction != 'none')
        that._bind(WHEEL_EV);
    }

    if (that.options.checkDOMChanges) that.checkDOMTime = setInterval(function () {
      that._checkDOMChanges();
    }, 500);
  };

// Prototype
iScroll.prototype = {
  enabled: true,
  x: 0,
  y: 0,
  steps: [],
  scale: 1,
  currPageX: 0, currPageY: 0,
  pagesX: [], pagesY: [],
  aniTime: null,
  wheelZoomCount: 0,
  
  handleEvent: function (e) {
    // QOOXDOO ENHANCEMENT - Use the qooxdoo event
    if (e.getType) {
      var type = e.getType();
    } else {
      var type = e.type;
    }
    if (e.getNativeEvent) {
      e = e.getNativeEvent();
    }
    var that = this;
    switch(type) {
      case START_EV:
        if (!hasTouch && e.button !== 0) return;
        that._start(e);
        break;
      case MOVE_EV: that._move(e); break;
      case END_EV:
      case CANCEL_EV: that._end(e); break;
      case RESIZE_EV: that._resize(); break;
      case WHEEL_EV: that._wheel(e); break;
      case 'mouseout': that._mouseout(e); break;
      case 'webkitTransitionEnd': that._transitionEnd(e); break;
    }
  },
  
  _checkDOMChanges: function () {
    if (this.moved || this.zoomed || this.animating ||
      (this.scrollerW == this.scroller.offsetWidth * this.scale && this.scrollerH == this.scroller.offsetHeight * this.scale)) return;

    this.refresh();
  },
  
  _scrollbar: function (dir) {
    var that = this,
      doc = document,
      bar;

    if (!that[dir + 'Scrollbar']) {
      if (that[dir + 'ScrollbarWrapper']) {
        if (hasTransform) that[dir + 'ScrollbarIndicator'].style[vendor + 'Transform'] = '';
        that[dir + 'ScrollbarWrapper'].parentNode.removeChild(that[dir + 'ScrollbarWrapper']);
        that[dir + 'ScrollbarWrapper'] = null;
        that[dir + 'ScrollbarIndicator'] = null;
      }

      return;
    }

    if (!that[dir + 'ScrollbarWrapper']) {
      // Create the scrollbar wrapper
      bar = doc.createElement('div');

      if (that.options.scrollbarClass) bar.className = that.options.scrollbarClass + dir.toUpperCase();
      else bar.style.cssText = 'position:absolute;z-index:100;' + (dir == 'h' ? 'height:7px;bottom:1px;left:2px;right:' + (that.vScrollbar ? '7' : '2') + 'px' : 'width:7px;bottom:' + (that.hScrollbar ? '7' : '2') + 'px;top:2px;right:1px');

      bar.style.cssText += ';pointer-events:none;-' + vendor + '-transition-property:opacity;-' + vendor + '-transition-duration:' + (that.options.fadeScrollbar ? '350ms' : '0') + ';overflow:hidden;opacity:' + (that.options.hideScrollbar ? '0' : '1');

      that.wrapper.appendChild(bar);
      that[dir + 'ScrollbarWrapper'] = bar;

      // Create the scrollbar indicator
      bar = doc.createElement('div');
      if (!that.options.scrollbarClass) {
        bar.style.cssText = 'position:absolute;z-index:100;background:rgba(0,0,0,0.5);border:1px solid rgba(255,255,255,0.9);-' + vendor + '-background-clip:padding-box;-' + vendor + '-box-sizing:border-box;' + (dir == 'h' ? 'height:100%' : 'width:100%') + ';-' + vendor + '-border-radius:3px;border-radius:3px';
      }
      bar.style.cssText += ';pointer-events:none;-' + vendor + '-transition-property:-' + vendor + '-transform;-' + vendor + '-transition-timing-function:cubic-bezier(0.33,0.66,0.66,1);-' + vendor + '-transition-duration:0;-' + vendor + '-transform:' + trnOpen + '0,0' + trnClose;
      if (that.options.useTransition) bar.style.cssText += ';-' + vendor + '-transition-timing-function:cubic-bezier(0.33,0.66,0.66,1)';

      that[dir + 'ScrollbarWrapper'].appendChild(bar);
      that[dir + 'ScrollbarIndicator'] = bar;
    }

    if (dir == 'h') {
      that.hScrollbarSize = that.hScrollbarWrapper.clientWidth;
      that.hScrollbarIndicatorSize = m.max(mround(that.hScrollbarSize * that.hScrollbarSize / that.scrollerW), 8);
      that.hScrollbarIndicator.style.width = that.hScrollbarIndicatorSize + 'px';
      that.hScrollbarMaxScroll = that.hScrollbarSize - that.hScrollbarIndicatorSize;
      that.hScrollbarProp = that.hScrollbarMaxScroll / that.maxScrollX;
    } else {
      that.vScrollbarSize = that.vScrollbarWrapper.clientHeight;
      that.vScrollbarIndicatorSize = m.max(mround(that.vScrollbarSize * that.vScrollbarSize / that.scrollerH), 8);
      that.vScrollbarIndicator.style.height = that.vScrollbarIndicatorSize + 'px';
      that.vScrollbarMaxScroll = that.vScrollbarSize - that.vScrollbarIndicatorSize;
      that.vScrollbarProp = that.vScrollbarMaxScroll / that.maxScrollY;
    }

    // Reset position
    that._scrollbarPos(dir, true);
  },
  
  _resize: function () {
    var that = this;
    setTimeout(function () { that.refresh(); }, isAndroid ? 200 : 0);
  },
  
  _pos: function (x, y) {
    x = this.hScroll ? x : 0;
    y = this.vScroll ? y : 0;

    if (this.options.useTransform) {
      this.scroller.style[vendor + 'Transform'] = trnOpen + x + 'px,' + y + 'px' + trnClose + ' scale(' + this.scale + ')';
    } else {
      x = mround(x);
      y = mround(y);
      this.scroller.style.left = x + 'px';
      this.scroller.style.top = y + 'px';
    }

    this.x = x;
    this.y = y;

    this._scrollbarPos('h');
    this._scrollbarPos('v');
  },

  _scrollbarPos: function (dir, hidden) {
    var that = this,
      pos = dir == 'h' ? that.x : that.y,
      size;

    if (!that[dir + 'Scrollbar']) return;

    pos = that[dir + 'ScrollbarProp'] * pos;

    if (pos < 0) {
      if (!that.options.fixedScrollbar) {
        size = that[dir + 'ScrollbarIndicatorSize'] + mround(pos * 3);
        if (size < 8) size = 8;
        that[dir + 'ScrollbarIndicator'].style[dir == 'h' ? 'width' : 'height'] = size + 'px';
      }
      pos = 0;
    } else if (pos > that[dir + 'ScrollbarMaxScroll']) {
      if (!that.options.fixedScrollbar) {
        size = that[dir + 'ScrollbarIndicatorSize'] - mround((pos - that[dir + 'ScrollbarMaxScroll']) * 3);
        if (size < 8) size = 8;
        that[dir + 'ScrollbarIndicator'].style[dir == 'h' ? 'width' : 'height'] = size + 'px';
        pos = that[dir + 'ScrollbarMaxScroll'] + (that[dir + 'ScrollbarIndicatorSize'] - size);
      } else {
        pos = that[dir + 'ScrollbarMaxScroll'];
      }
    }

    that[dir + 'ScrollbarWrapper'].style[vendor + 'TransitionDelay'] = '0';
    that[dir + 'ScrollbarWrapper'].style.opacity = hidden && that.options.hideScrollbar ? '0' : '1';
    that[dir + 'ScrollbarIndicator'].style[vendor + 'Transform'] = trnOpen + (dir == 'h' ? pos + 'px,0' : '0,' + pos + 'px') + trnClose;
  },
  
  _start: function (e) {
    var that = this,
      point = hasTouch ? e.touches[0] : e,
      matrix, x, y,
      c1, c2;

    if (!that.enabled) return;

    if (that.options.onBeforeScrollStart) that.options.onBeforeScrollStart.call(that, e);

    if (that.options.useTransition || that.options.zoom) that._transitionTime(0);

    that.moved = false;
    that.animating = false;
    that.zoomed = false;
    that.distX = 0;
    that.distY = 0;
    that.absDistX = 0;
    that.absDistY = 0;
    that.dirX = 0;
    that.dirY = 0;

    // Gesture start
    if (that.options.zoom && hasTouch && e.touches.length > 1) {
      c1 = m.abs(e.touches[0].pageX-e.touches[1].pageX);
      c2 = m.abs(e.touches[0].pageY-e.touches[1].pageY);
      that.touchesDistStart = m.sqrt(c1 * c1 + c2 * c2);

      that.originX = m.abs(e.touches[0].pageX + e.touches[1].pageX - that.wrapperOffsetLeft * 2) / 2 - that.x;
      that.originY = m.abs(e.touches[0].pageY + e.touches[1].pageY - that.wrapperOffsetTop * 2) / 2 - that.y;

      if (that.options.onZoomStart) that.options.onZoomStart.call(that, e);
    }

    if (that.options.momentum) {
      if (that.options.useTransform) {
        // Very lame general purpose alternative to CSSMatrix
        matrix = getComputedStyle(that.scroller, null)[vendor + 'Transform'].replace(/[^0-9-.,]/g, '').split(',');
        x = matrix[4] * 1;
        y = matrix[5] * 1;
      } else {
        x = getComputedStyle(that.scroller, null).left.replace(/[^0-9-]/g, '') * 1;
        y = getComputedStyle(that.scroller, null).top.replace(/[^0-9-]/g, '') * 1;
      }
      
      if (x != that.x || y != that.y) {
        if (that.options.useTransition) that._unbind('webkitTransitionEnd');
        else cancelFrame(that.aniTime);
        that.steps = [];
        that._pos(x, y);
      }
    }

    that.absStartX = that.x;  // Needed by snap threshold
    that.absStartY = that.y;

    that.startX = that.x;
    that.startY = that.y;
    that.pointX = point.pageX;
    that.pointY = point.pageY;

    that.startTime = e.timeStamp || Date.now();

    if (that.options.onScrollStart) that.options.onScrollStart.call(that, e);

    that._bind(MOVE_EV);
    that._bind(END_EV);
    that._bind(CANCEL_EV);
  },
  
  _move: function (e) {
    var that = this,
      point = hasTouch ? e.touches[0] : e,
      deltaX = point.pageX - that.pointX,
      deltaY = point.pageY - that.pointY,
      newX = that.x + deltaX,
      newY = that.y + deltaY,
      c1, c2, scale,
      timestamp = e.timeStamp || Date.now();

    if (that.options.onBeforeScrollMove) that.options.onBeforeScrollMove.call(that, e);

    // Zoom
    if (that.options.zoom && hasTouch && e.touches.length > 1) {
      c1 = m.abs(e.touches[0].pageX - e.touches[1].pageX);
      c2 = m.abs(e.touches[0].pageY - e.touches[1].pageY);
      that.touchesDist = m.sqrt(c1*c1+c2*c2);

      that.zoomed = true;

      scale = 1 / that.touchesDistStart * that.touchesDist * this.scale;

      if (scale < that.options.zoomMin) scale = 0.5 * that.options.zoomMin * Math.pow(2.0, scale / that.options.zoomMin);
      else if (scale > that.options.zoomMax) scale = 2.0 * that.options.zoomMax * Math.pow(0.5, that.options.zoomMax / scale);

      that.lastScale = scale / this.scale;

      newX = this.originX - this.originX * that.lastScale + this.x,
      newY = this.originY - this.originY * that.lastScale + this.y;

      this.scroller.style[vendor + 'Transform'] = trnOpen + newX + 'px,' + newY + 'px' + trnClose + ' scale(' + scale + ')';

      if (that.options.onZoom) that.options.onZoom.call(that, e);
      return;
    }

    that.pointX = point.pageX;
    that.pointY = point.pageY;

    // Slow down if outside of the boundaries
    if (newX > 0 || newX < that.maxScrollX) {
      newX = that.options.bounce ? that.x + (deltaX / 2) : newX >= 0 || that.maxScrollX >= 0 ? 0 : that.maxScrollX;
    }
    if (newY > that.minScrollY || newY < that.maxScrollY) { 
      newY = that.options.bounce ? that.y + (deltaY / 2) : newY >= that.minScrollY || that.maxScrollY >= 0 ? that.minScrollY : that.maxScrollY;
    }

    if (that.absDistX < 6 && that.absDistY < 6) {
      that.distX += deltaX;
      that.distY += deltaY;
      that.absDistX = m.abs(that.distX);
      that.absDistY = m.abs(that.distY);

      return;
    }

    // Lock direction
    if (that.options.lockDirection) {
      if (that.absDistX > that.absDistY + 5) {
        newY = that.y;
        deltaY = 0;
      } else if (that.absDistY > that.absDistX + 5) {
        newX = that.x;
        deltaX = 0;
      }
    }

    that.moved = true;
    that._pos(newX, newY);
    that.dirX = deltaX > 0 ? -1 : deltaX < 0 ? 1 : 0;
    that.dirY = deltaY > 0 ? -1 : deltaY < 0 ? 1 : 0;

    if (timestamp - that.startTime > 300) {
      that.startTime = timestamp;
      that.startX = that.x;
      that.startY = that.y;
    }
    
    if (that.options.onScrollMove) that.options.onScrollMove.call(that, e);
  },
  
  _end: function (e) {
    if (hasTouch && e.touches.length != 0) return;

    var that = this,
      point = hasTouch ? e.changedTouches[0] : e,
      target, ev,
      momentumX = { dist:0, time:0 },
      momentumY = { dist:0, time:0 },
      duration = (e.timeStamp || Date.now()) - that.startTime,
      newPosX = that.x,
      newPosY = that.y,
      distX, distY,
      newDuration,
      snap,
      scale;

    that._unbind(MOVE_EV);
    that._unbind(END_EV);
    that._unbind(CANCEL_EV);

    if (that.options.onBeforeScrollEnd) that.options.onBeforeScrollEnd.call(that, e);

    if (that.zoomed) {
      scale = that.scale * that.lastScale;
      scale = Math.max(that.options.zoomMin, scale);
      scale = Math.min(that.options.zoomMax, scale);
      that.lastScale = scale / that.scale;
      that.scale = scale;

      that.x = that.originX - that.originX * that.lastScale + that.x;
      that.y = that.originY - that.originY * that.lastScale + that.y;
      
      that.scroller.style[vendor + 'TransitionDuration'] = '200ms';
      that.scroller.style[vendor + 'Transform'] = trnOpen + that.x + 'px,' + that.y + 'px' + trnClose + ' scale(' + that.scale + ')';
      
      that.zoomed = false;
      that.refresh();

      if (that.options.onZoomEnd) that.options.onZoomEnd.call(that, e);
      return;
    }

    if (!that.moved) {
      
       if (hasTouch) {
        
        if (that.doubleTapTimer && that.options.zoom) {
          // Double tapped
          clearTimeout(that.doubleTapTimer);
          that.doubleTapTimer = null;
          if (that.options.onZoomStart) that.options.onZoomStart.call(that, e);
          that.zoom(that.pointX, that.pointY, that.scale == 1 ? that.options.doubleTapZoom : 1);
          if (that.options.onZoomEnd) {
            setTimeout(function() {
              that.options.onZoomEnd.call(that, e);
            }, 200); // 200 is default zoom duration
          }
        } else {
          that.doubleTapTimer = setTimeout(function () {
            that.doubleTapTimer = null;

            // Find the last touched element
            target = point.target;
            while (target.nodeType != 1) target = target.parentNode;

            if (target.tagName != 'SELECT' && target.tagName != 'INPUT' && target.tagName != 'TEXTAREA') {
              ev = document.createEvent('MouseEvents');
              ev.initMouseEvent('click', true, true, e.view, 1,
                point.screenX, point.screenY, point.clientX, point.clientY,
                e.ctrlKey, e.altKey, e.shiftKey, e.metaKey,
                0, null);
              ev._fake = true;
              //target.dispatchEvent(ev);
            }
          }, that.options.zoom ? 250 : 0);
        }
      }

      that._resetPos(200);

      if (that.options.onTouchEnd) that.options.onTouchEnd.call(that, e);
      return;
    }

    if (duration < 300 && that.options.momentum) {
      momentumX = newPosX ? that._momentum(newPosX - that.startX, duration, -that.x, that.scrollerW - that.wrapperW + that.x, that.options.bounce ? that.wrapperW : 0) : momentumX;
      momentumY = newPosY ? that._momentum(newPosY - that.startY, duration, -that.y, (that.maxScrollY < 0 ? that.scrollerH - that.wrapperH + that.y - that.minScrollY : 0), that.options.bounce ? that.wrapperH : 0) : momentumY;

      newPosX = that.x + momentumX.dist;
      newPosY = that.y + momentumY.dist;

      if ((that.x > 0 && newPosX > 0) || (that.x < that.maxScrollX && newPosX < that.maxScrollX)) momentumX = { dist:0, time:0 };
      if ((that.y > that.minScrollY && newPosY > that.minScrollY) || (that.y < that.maxScrollY && newPosY < that.maxScrollY)) momentumY = { dist:0, time:0 };
    }

    if (momentumX.dist || momentumY.dist) {
      newDuration = m.max(m.max(momentumX.time, momentumY.time), 10);

      // Do we need to snap?
      if (that.options.snap) {
        distX = newPosX - that.absStartX;
        distY = newPosY - that.absStartY;
        if (m.abs(distX) < that.options.snapThreshold && m.abs(distY) < that.options.snapThreshold) { that.scrollTo(that.absStartX, that.absStartY, 200); }
        else {
          snap = that._snap(newPosX, newPosY);
          newPosX = snap.x;
          newPosY = snap.y;
          newDuration = m.max(snap.time, newDuration);
        }
      }

      that.scrollTo(mround(newPosX), mround(newPosY), newDuration);

      if (that.options.onTouchEnd) that.options.onTouchEnd.call(that, e);
      return;
    }

    // Do we need to snap?
    if (that.options.snap) {
      distX = newPosX - that.absStartX;
      distY = newPosY - that.absStartY;
      if (m.abs(distX) < that.options.snapThreshold && m.abs(distY) < that.options.snapThreshold) that.scrollTo(that.absStartX, that.absStartY, 200);
      else {
        snap = that._snap(that.x, that.y);
        if (snap.x != that.x || snap.y != that.y) that.scrollTo(snap.x, snap.y, snap.time);
      }

      if (that.options.onTouchEnd) that.options.onTouchEnd.call(that, e);
      return;
    }

    that._resetPos(200);
    if (that.options.onTouchEnd) that.options.onTouchEnd.call(that, e);
  },
  
  _resetPos: function (time) {
    var that = this,
      resetX = that.x >= 0 ? 0 : that.x < that.maxScrollX ? that.maxScrollX : that.x,
      resetY = that.y >= that.minScrollY || that.maxScrollY > 0 ? that.minScrollY : that.y < that.maxScrollY ? that.maxScrollY : that.y;

    if (resetX == that.x && resetY == that.y) {
      if (that.moved) {
        that.moved = false;
        if (that.options.onScrollEnd) that.options.onScrollEnd.call(that);    // Execute custom code on scroll end
      }

      if (that.hScrollbar && that.options.hideScrollbar) {
        if (vendor == 'webkit') that.hScrollbarWrapper.style[vendor + 'TransitionDelay'] = '300ms';
        that.hScrollbarWrapper.style.opacity = '0';
      }
      if (that.vScrollbar && that.options.hideScrollbar) {
        if (vendor == 'webkit') that.vScrollbarWrapper.style[vendor + 'TransitionDelay'] = '300ms';
        that.vScrollbarWrapper.style.opacity = '0';
      }

      return;
    }

    that.scrollTo(resetX, resetY, time || 0);
  },

  _wheel: function (e) {
    var that = this,
      wheelDeltaX, wheelDeltaY,
      deltaX, deltaY,
      deltaScale;

    if ('wheelDeltaX' in e) {
      wheelDeltaX = e.wheelDeltaX / 12;
      wheelDeltaY = e.wheelDeltaY / 12;
    } else if ('detail' in e) {
      wheelDeltaX = wheelDeltaY = -e.detail * 3;
    } else {
      wheelDeltaX = wheelDeltaY = -e.wheelDelta;
    }
    
    if (that.options.wheelAction == 'zoom') {
      deltaScale = that.scale * Math.pow(2, 1/3 * (wheelDeltaY ? wheelDeltaY / Math.abs(wheelDeltaY) : 0));
      if (deltaScale < that.options.zoomMin) deltaScale = that.options.zoomMin;
      if (deltaScale > that.options.zoomMax) deltaScale = that.options.zoomMax;
      
      if (deltaScale != that.scale) {
        if (!that.wheelZoomCount && that.options.onZoomStart) that.options.onZoomStart.call(that, e);
        that.wheelZoomCount++;
        
        that.zoom(e.pageX, e.pageY, deltaScale, 400);
        
        setTimeout(function() {
          that.wheelZoomCount--;
          if (!that.wheelZoomCount && that.options.onZoomEnd) that.options.onZoomEnd.call(that, e);
        }, 400);
      }
      
      return;
    }
    
    deltaX = that.x + wheelDeltaX;
    deltaY = that.y + wheelDeltaY;

    if (deltaX > 0) deltaX = 0;
    else if (deltaX < that.maxScrollX) deltaX = that.maxScrollX;

    if (deltaY > that.minScrollY) deltaY = that.minScrollY;
    else if (deltaY < that.maxScrollY) deltaY = that.maxScrollY;

    that.scrollTo(deltaX, deltaY, 0);
  },
  
  _mouseout: function (e) {
    var t = e.relatedTarget;

    if (!t) {
      this._end(e);
      return;
    }

    while (t = t.parentNode) if (t == this.wrapper) return;
    
    this._end(e);
  },

  _transitionEnd: function (e) {
    var that = this;

    if (e.target != that.scroller) return;

    that._unbind('webkitTransitionEnd');
    
    that._startAni();
  },


  /**
   *
   * Utilities
   *
   */
  _startAni: function () {
    var that = this,
      startX = that.x, startY = that.y,
      startTime = Date.now(),
      step, easeOut,
      animate;

    if (that.animating) return;
    
    if (!that.steps.length) {
      that._resetPos(400);
      return;
    }
    
    step = that.steps.shift();
    
    if (step.x == startX && step.y == startY) step.time = 0;

    that.animating = true;
    that.moved = true;
    
    if (that.options.useTransition) {
      that._transitionTime(step.time);
      that._pos(step.x, step.y);
      that.animating = false;
      if (step.time) that._bind('webkitTransitionEnd');
      else that._resetPos(0);
      return;
    }

    animate = function () {
      var now = Date.now(),
        newX, newY;

      if (now >= startTime + step.time) {
        that._pos(step.x, step.y);
        that.animating = false;
        if (that.options.onAnimationEnd) that.options.onAnimationEnd.call(that);      // Execute custom code on animation end
        that._startAni();
        return;
      }

      now = (now - startTime) / step.time - 1;
      easeOut = m.sqrt(1 - now * now);
      newX = (step.x - startX) * easeOut + startX;
      newY = (step.y - startY) * easeOut + startY;
      that._pos(newX, newY);
      if (that.animating) that.aniTime = nextFrame(animate);
    };

    animate();
  },

  _transitionTime: function (time) {
    time += 'ms';
    this.scroller.style[vendor + 'TransitionDuration'] = time;
    if (this.hScrollbar) this.hScrollbarIndicator.style[vendor + 'TransitionDuration'] = time;
    if (this.vScrollbar) this.vScrollbarIndicator.style[vendor + 'TransitionDuration'] = time;
  },

  _momentum: function (dist, time, maxDistUpper, maxDistLower, size) {
    var deceleration = 0.0006,
      speed = m.abs(dist) / time,
      newDist = (speed * speed) / (2 * deceleration),
      newTime = 0, outsideDist = 0;

    // Proportinally reduce speed if we are outside of the boundaries 
    if (dist > 0 && newDist > maxDistUpper) {
      outsideDist = size / (6 / (newDist / speed * deceleration));
      maxDistUpper = maxDistUpper + outsideDist;
      speed = speed * maxDistUpper / newDist;
      newDist = maxDistUpper;
    } else if (dist < 0 && newDist > maxDistLower) {
      outsideDist = size / (6 / (newDist / speed * deceleration));
      maxDistLower = maxDistLower + outsideDist;
      speed = speed * maxDistLower / newDist;
      newDist = maxDistLower;
    }

    newDist = newDist * (dist < 0 ? -1 : 1);
    newTime = speed / deceleration;

    return { dist: newDist, time: mround(newTime) };
  },

  _offset: function (el) {
    var left = -el.offsetLeft,
      top = -el.offsetTop;
      
    while (el = el.offsetParent) {
      left -= el.offsetLeft;
      top -= el.offsetTop;
    }
    
    if (el != this.wrapper) {
      left *= this.scale;
      top *= this.scale;
    }

    return { left: left, top: top };
  },

  _snap: function (x, y) {
    var that = this,
      i, l,
      page, time,
      sizeX, sizeY;

    // Check page X
    page = that.pagesX.length - 1;
    for (i=0, l=that.pagesX.length; i<l; i++) {
      if (x >= that.pagesX[i]) {
        page = i;
        break;
      }
    }
    if (page == that.currPageX && page > 0 && that.dirX < 0) page--;
    x = that.pagesX[page];
    sizeX = m.abs(x - that.pagesX[that.currPageX]);
    sizeX = sizeX ? m.abs(that.x - x) / sizeX * 500 : 0;
    that.currPageX = page;

    // Check page Y
    page = that.pagesY.length-1;
    for (i=0; i<page; i++) {
      if (y >= that.pagesY[i]) {
        page = i;
        break;
      }
    }
    if (page == that.currPageY && page > 0 && that.dirY < 0) page--;
    y = that.pagesY[page];
    sizeY = m.abs(y - that.pagesY[that.currPageY]);
    sizeY = sizeY ? m.abs(that.y - y) / sizeY * 500 : 0;
    that.currPageY = page;

    // Snap with constant speed (proportional duration)
    time = mround(m.max(sizeX, sizeY)) || 200;

    return { x: x, y: y, time: time };
  },

  _bind: function (type, el, bubble) {
    // QOOXDOO ENHANCEMENT: Use the qooxdoo event registration + types
    type = type != 'webkitTransitionEnd' ? type : 'transitionEnd';
    qx.event.Registration.addListener(el || this.scroller, type, this.handleEvent, this, !!bubble);
  },

  _unbind: function (type, el, bubble) {
    // QOOXDOO ENHANCEMENT: Use the qooxdoo event registration + types
    type = type != 'webkitTransitionEnd' ? type : 'transitionEnd';
    qx.event.Registration.removeListener(el || this.scroller, type, this.handleEvent, this, !!bubble);
  },


  /**
   *
   * Public methods
   *
   */
  destroy: function () {
    var that = this;

    that.scroller.style[vendor + 'Transform'] = '';

    // Remove the scrollbars
    that.hScrollbar = false;
    that.vScrollbar = false;
    that._scrollbar('h');
    that._scrollbar('v');

    // Remove the event listeners
    that._unbind(RESIZE_EV, window);
    that._unbind(START_EV);
    that._unbind(MOVE_EV);
    that._unbind(END_EV);
    that._unbind(CANCEL_EV);
    
    if (!that.options.hasTouch) {
      that._unbind('mouseout', that.wrapper);
      that._unbind(WHEEL_EV);
    }
    
    if (that.options.useTransition) that._unbind('webkitTransitionEnd');
    
    if (that.options.checkDOMChanges) clearInterval(that.checkDOMTime);
    
    if (that.options.onDestroy) that.options.onDestroy.call(that);
  },

  refresh: function () {
    var that = this,
      offset,
      i, l,
      els,
      pos = 0,
      page = 0;

    if (that.scale < that.options.zoomMin) that.scale = that.options.zoomMin;
    that.wrapperW = that.wrapper.clientWidth || 1;
    that.wrapperH = that.wrapper.clientHeight || 1;

    that.minScrollY = -that.options.topOffset || 0;
    that.scrollerW = mround(that.scroller.offsetWidth * that.scale);
    that.scrollerH = mround((that.scroller.offsetHeight + that.minScrollY) * that.scale);
    that.maxScrollX = that.wrapperW - that.scrollerW;
    that.maxScrollY = that.wrapperH - that.scrollerH + that.minScrollY;
    that.dirX = 0;
    that.dirY = 0;

    if (that.options.onRefresh) that.options.onRefresh.call(that);

    that.hScroll = that.options.hScroll && that.maxScrollX < 0;
    that.vScroll = that.options.vScroll && (!that.options.bounceLock && !that.hScroll || that.scrollerH > that.wrapperH);

    that.hScrollbar = that.hScroll && that.options.hScrollbar;
    that.vScrollbar = that.vScroll && that.options.vScrollbar && that.scrollerH > that.wrapperH;

    offset = that._offset(that.wrapper);
    that.wrapperOffsetLeft = -offset.left;
    that.wrapperOffsetTop = -offset.top;

    // Prepare snap
    if (typeof that.options.snap == 'string') {
      that.pagesX = [];
      that.pagesY = [];
      els = that.scroller.querySelectorAll(that.options.snap);
      for (i=0, l=els.length; i<l; i++) {
        pos = that._offset(els[i]);
        pos.left += that.wrapperOffsetLeft;
        pos.top += that.wrapperOffsetTop;
        that.pagesX[i] = pos.left < that.maxScrollX ? that.maxScrollX : pos.left * that.scale;
        that.pagesY[i] = pos.top < that.maxScrollY ? that.maxScrollY : pos.top * that.scale;
      }
    } else if (that.options.snap) {
      that.pagesX = [];
      while (pos >= that.maxScrollX) {
        that.pagesX[page] = pos;
        pos = pos - that.wrapperW;
        page++;
      }
      if (that.maxScrollX%that.wrapperW) that.pagesX[that.pagesX.length] = that.maxScrollX - that.pagesX[that.pagesX.length-1] + that.pagesX[that.pagesX.length-1];

      pos = 0;
      page = 0;
      that.pagesY = [];
      while (pos >= that.maxScrollY) {
        that.pagesY[page] = pos;
        pos = pos - that.wrapperH;
        page++;
      }
      if (that.maxScrollY%that.wrapperH) that.pagesY[that.pagesY.length] = that.maxScrollY - that.pagesY[that.pagesY.length-1] + that.pagesY[that.pagesY.length-1];
    }

    // Prepare the scrollbars
    that._scrollbar('h');
    that._scrollbar('v');

    if (!that.zoomed) {
      that.scroller.style[vendor + 'TransitionDuration'] = '0';
      that._resetPos(200);
    }
  },

  scrollTo: function (x, y, time, relative) {
    var that = this,
      step = x,
      i, l;

    that.stop();

    if (!step.length) step = [{ x: x, y: y, time: time, relative: relative }];
    
    for (i=0, l=step.length; i<l; i++) {
      if (step[i].relative) { step[i].x = that.x - step[i].x; step[i].y = that.y - step[i].y; }
      that.steps.push({ x: step[i].x, y: step[i].y, time: step[i].time || 0 });
    }

    that._startAni();
  },

  scrollToElement: function (el, time) {
    var that = this, pos;
    el = el.nodeType ? el : that.scroller.querySelector(el);
    if (!el) return;

    pos = that._offset(el);
    pos.left += that.wrapperOffsetLeft;
    pos.top += that.wrapperOffsetTop;

    pos.left = pos.left > 0 ? 0 : pos.left < that.maxScrollX ? that.maxScrollX : pos.left;
    pos.top = pos.top > that.minScrollY ? that.minScrollY : pos.top < that.maxScrollY ? that.maxScrollY : pos.top;
    time = time === undefined ? m.max(m.abs(pos.left)*2, m.abs(pos.top)*2) : time;

    that.scrollTo(pos.left, pos.top, time);
  },

  scrollToPage: function (pageX, pageY, time) {
    var that = this, x, y;

    if (that.options.onScrollStart) that.options.onScrollStart.call(that);

    if (that.options.snap) {
      pageX = pageX == 'next' ? that.currPageX+1 : pageX == 'prev' ? that.currPageX-1 : pageX;
      pageY = pageY == 'next' ? that.currPageY+1 : pageY == 'prev' ? that.currPageY-1 : pageY;

      pageX = pageX < 0 ? 0 : pageX > that.pagesX.length-1 ? that.pagesX.length-1 : pageX;
      pageY = pageY < 0 ? 0 : pageY > that.pagesY.length-1 ? that.pagesY.length-1 : pageY;

      that.currPageX = pageX;
      that.currPageY = pageY;
      x = that.pagesX[pageX];
      y = that.pagesY[pageY];
    } else {
      x = -that.wrapperW * pageX;
      y = -that.wrapperH * pageY;
      if (x < that.maxScrollX) x = that.maxScrollX;
      if (y < that.maxScrollY) y = that.maxScrollY;
    }

    that.scrollTo(x, y, time || 400);
  },

  disable: function () {
    this.stop();
    this._resetPos(0);
    this.enabled = false;

    // If disabled after touchstart we make sure that there are no left over events
    this._unbind(MOVE_EV);
    this._unbind(END_EV);
    this._unbind(CANCEL_EV);
  },
  
  enable: function () {
    this.enabled = true;
  },
  
  stop: function () {
    if (this.options.useTransition) this._unbind('webkitTransitionEnd');
    else cancelFrame(this.aniTime);
    this.steps = [];
    this.moved = false;
    this.animating = false;
  },
  
  zoom: function (x, y, scale, time) {
    var that = this,
      relScale = scale / that.scale;

    if (!that.options.useTransform) return;

    that.zoomed = true;
    time = time === undefined ? 200 : time;
    x = x - that.wrapperOffsetLeft - that.x;
    y = y - that.wrapperOffsetTop - that.y;
    that.x = x - x * relScale + that.x;
    that.y = y - y * relScale + that.y;

    that.scale = scale;
    that.refresh();

    that.x = that.x > 0 ? 0 : that.x < that.maxScrollX ? that.maxScrollX : that.x;
    that.y = that.y > that.minScrollY ? that.minScrollY : that.y < that.maxScrollY ? that.maxScrollY : that.y;

    that.scroller.style[vendor + 'TransitionDuration'] = time + 'ms';
    that.scroller.style[vendor + 'Transform'] = trnOpen + that.x + 'px,' + that.y + 'px' + trnClose + ' scale(' + scale + ')';
    that.zoomed = false;
  },
  
  isReady: function () {
    return !this.moved && !this.zoomed && !this.animating;
  }
};

if (typeof exports !== 'undefined') exports.iScroll = iScroll;
else window.iScroll = iScroll;

})();